Cookies

We use our own and third-party cookies to improve our services.

$ whoami

Leonel Gareis

|

Building reliable systems, one automation at a time.

Get in touch View projects

01. About Me

I'm a Site Reliability Engineer and DevOps specialist with a passion for building robust, scalable infrastructure. My approach combines the reliability mindset of SRE with the automation-first philosophy of DevOps.

I specialize in designing CI/CD pipelines, implementing infrastructure as code, and ensuring systems are both secure and observable. When I'm not automating deployments, I'm probably debugging Kubernetes manifests or optimizing monitoring dashboards.

Here are some technologies I work with:

  • Kubernetes / Docker
  • Terraform / Ansible
  • AWS / GCP / Azure
  • GitHub Actions / GitLab CI
  • Prometheus / Grafana
  • Python / Go / Bash
leonel@portfolio:~

$ cat /etc/profile

ROLE="SRE / DevOps Engineer"

LOCATION="Argentina"

INTERESTS=("automation" "security" "observability")

$ uptime

99.9% availability mindset

$ _

02. Projects

InternalWizzard

An in-progress Internal Developer Platform (IDP) to standardize application lifecycles: Kubernetes orchestration, GitOps deployments with ArgoCD, and OIDC/Keycloak authentication, powered by an event-driven core built on RabbitMQ.

  • Go
  • Kubernetes
  • ArgoCD
  • OIDC
  • Keycloak
  • RabbitMQ

KafkaTUI

A Python (Textual) terminal UI for Kafka operations: topic/partition inspection, message browsing, and offset visibility. Built for fast troubleshooting and daily SRE/Platform workflows without heavy dashboards.

  • Python
  • Textual
  • Kafka
  • TUI
  • SRE Tooling

03. Experience

Site Reliability Engineer

@ CFOTech

Oct 2024 - Present

  • Managed production Kubernetes clusters and AWS environments with a strong focus on high availability and resilience.
  • Implemented Infrastructure as Code using Terraform.
  • Actively participated in incident response, root cause analysis, and permanent remediation.
  • Drove cloud cost optimization initiatives without compromising performance or reliability.
  • Provided direct support to development teams on pipelines, deployments, and cloud architecture.

DevSecOps Consultant

@ Adcap Grupo Financiero

Oct 2024 - Jan 2025

  • Resolved critical incidents related to Kubernetes, ArgoCD, and production deployments.
  • Improved monitoring and observability using Prometheus and Grafana.
  • Participated in high-severity production incident calls.
  • Provided hands-on support to stabilize cloud infrastructure.

DevSecOps Lead

@ Adcap Grupo Financiero

Feb 2024 - Oct 2024

  • Led the DevSecOps strategy by integrating security across the entire software development lifecycle.
  • Designed CI/CD pipelines with automated vulnerability scanning (Trivy) and compliance checks.
  • Managed production Kubernetes environments using ArgoCD and a GitOps approach.
  • Implemented secure secrets management with External Secrets and centralized authentication using Keycloak.
  • Strengthened observability using Prometheus, Grafana, and Elasticsearch.
  • Mentored the DevSecOps team and defined security standards for development teams.

Tech Lead

@ Adcap Grupo Financiero

Aug 2022 - Feb 2024

  • Led the development of APIBroker, a core API for financial integrations.
  • Designed a microservices-based architecture using Python, Docker, and Kubernetes.
  • Defined technical standards, CI/CD workflows, and best engineering practices.
  • Provided technical leadership and mentorship to the backend team.
  • Worked closely with AWS to ensure scalability and reliability.

Backend Developer

@ Banza / Adcap

Jun 2021 - Aug 2022

  • Developed cloud-native backend services on AWS.
  • Worked with Lambda, DynamoDB, Aurora, SQS, ECS, ECR, and CloudFormation.
  • Implemented event-driven architectures for scalable processing.
  • Optimized API performance and resilience for financial workloads.

Backend Developer

@ Talent Hackers

Dec 2022 - Feb 2024

  • Designed and optimized REST APIs using Django and Django REST Framework.
  • Built and deployed cloud-native solutions with Docker, AWS ECS, and EventBridge.
  • Applied clean architecture principles and testing strategies.
  • Worked 100% remotely in distributed international teams.

Python Instructor

@ Coderhouse

Jan 2022 - Dec 2022

  • Trained developers in Python from beginner to intermediate levels.
  • Provided technical mentorship and personalized guidance.
  • Focused on practical, real-world programming challenges.

Python Developer

@ Vicino Software Factory

May 2021 - Aug 2021

  • Developed REST APIs using Django REST Framework.
  • Optimized endpoints and database models.
  • Worked in Dockerized environments with PostgreSQL.

Full Stack Developer

@ Materia Sistemas

Aug 2020 - Aug 2022

  • Developed and maintained the company’s core ERP system using Python.
  • Built frontend interfaces in React to improve UX and performance.
  • Acted as Principal Developer, coordinating multidisciplinary teams.

Backend Developer

@ Freelance

2019 - 2021

  • Developed RESTful APIs and microservices using Python and Node.js
  • Introduced containerization practices and development workflows using Docker
  • Collaborated with multidisciplinary teams on client projects

04. Get In Touch

I'm always open to discussing new projects, opportunities, or just chatting about infrastructure and automation. Feel free to reach out!

Send Email Instagram

$ echo "Built love, coffee and GPT"

© 2025 Leonel Gareis